<p>After closing Monday one $71.52, just as videos showing passenger David Dao being dragged from a plane spread like wild on social media, United shares ended up falling 4 percent over the course of the week. The stock ended up at $69 on Thursday, reducing the company's market cap by $770 million to $21.5 billion. Markets are closed today for Good Friday.</p>

Delta Air Lines has increased the payouts its airport agents can offer passengers on overbooked flights, moving to prevent a public relations nightmare similar to the one plaguing United Continental Holdings Inc.